agency stops drinking & driving

Publicis Brussels wanted to stop drinking and driving, so they created a parking gate exiting a major night club that only lifted if the driver blew sober on a breathalyzer.

I'm not really sure how this is advertising, nor the job of an agency to do, though I suppose it's a PR stunt, and it's quite brilliant! And, it proved quite effective, with 90% of club goers smart enough to find a sober driver, or wait until they became sober, to try and leave.